Enstrophy generation in a shock-dominated turbulence

被引：2
|
作者：
Miura, H
机构：
[1] Theor./Computer Simulation Center, Natl. Institute for Fusion Science
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1996年 / 65卷 / 02期
关键词：
compressible fluid; shock; turbulence; vorticity generation; vortex pair; baroclinic term; alignment of the vorticity vector;
D O I：
10.1143/JPSJ.65.450
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A mechanism of enstrophy generation is investigated numerically in a shock-dominated turbulence driven by a random external force which has only the compressible component. Enstrophy is generated, especially on collision of shock, as a pair of vortex tube of opposite sense of rotation behind curved shocks. The roles of various terms in enstrophy equation are clarified in enstrophy generation process. Generation of enstrophy is enhanced by strong alignment of each term of the enstrophy equation with the vorticity vector.
引用
收藏
页码：450 / 461
页数：12
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